Renewable blade knife



R. E. SMITH Sept. 15, 1936.

RENEWABLE BLADE KNIFE Filed June 10, 1935 2% INVENTOR ATTORNEY PatentedSept. 15, 1936 UNITED STATES PATENT OFFICE 1 Claim.

The invention relates to a knife and more especially to a renewablebladed knife.

The primary object of the invention is the provision of a knife of thischaracter, wherein a ribbon blade is carried in a position thereby sothat the said blade can be fed to present to the nife a fresh cuttingedge to assure a continued maintenance of a sharp cutting edge in thatwhen a presented edge becomes dull a sharpened edge Will be caused totake the place hereof and in this fashion the knife will be in acontinued sharpened condition for service without necessitatingsharpening thereof.

Another object of the invention is the provision of a knife of thischaracter, wherein the ribbon cutting blade is mounted in the knife in anovel manner so that the blade may be fed in cutting position and thusthe knife is assured of sharpness in the continued or repeated uses ofthe same, the knife in its entirety being of novel construction.

A further object of the invention is the provision of a knife of thischaracter, which is simple in construction, reliable and efficient inoperation, assured of a continuity of sharpened condition, strong,durable and inexpensive to manufacture.

With these and other objects in view, the invention consists in thefeatures of construction, combination and arrangement of parts as willbe hereinafter more fully described, illustrated in the accompanyingdrawing, which'discloses the preferred embodiment of the invention andpointed out in the claim hereunto appended.

In the accompanying drawing:

Figure 1 is a side elevation of a knife constructed in accordance withthe invention and the same being partly broken away.

Figure 2 is a horizontal sectional View taken longitudinally of theknife.

Figure 3 is a sectional View on the line 3-3 of Figure 1 looking in thedirection of the arrows.

Figure 4 is a sectional view on the line 44 of Figure 1 looking in thedirection of the arrows.

Figure 5 is a fragmentary horizontal sectional view showing in detail aspur guide wheel for the blade of the knife.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawing.

Referring to the drawing in detail, the knife comprises a blade stock l0and a handle stock I 9, respectively, the handle stock beinglongitudinally split to provide complementary parts, these is a magazineor chamber l5 for accommodating 10 a coiled flexible ribbon-like cuttingblade E6, the magazine or chamber being communicative with a Way llprovided in the parts of the stock H which is carried longitudinallythrough the lower edge of the blade stock It and opens through the freeend thereof remote from or opposite the handle stock end. This way llopens through the lowermost edge or what might be termed the cuttingedge of the blade stock ID to expose the blade l6 therethrough whichblade has 20 the knife or cutting edge l8. It is preferable to have theedge carrying the blade !6 at opposite outer sides thereof reverselybeveled at l9 to thin the blade stock in conformity with the cuttingedge or knife l8 of the blade I6.

25 Rotatably Journaled in one part of the handle stock I! at one side ofthe blade l 5 is a horizontally disposed spur feed wheel 20, its spurs ibeing in meshing engagement with holes 22 provided in the blade It in arow and equally distanced in spaced relation to each other. The arbor oraxle 23 for the wheel 29 is adjustable and is held Within a barrel 24fitted in the handle stock It so that the screw driver engaged end 25 ofsuch arbor is exposed without the handle stock and the barrel 24 wherebythe arbor 23 through the use of a screw driver (not shown) can be turnedso that the open wheel 20 will function as a feeder for the blade 6 toextend the same through the way H and in this fashion a fresh or sharperedge l8 of the blade can be exposed from the knife stock I0.

This knife stock NJ has formed therein an elongated slot 26 at one sideof the way I! and this slot 26 is in alignment with the row of holes 22in the blade I6 so that pins or the like may be passed through the holes22 that register with the end walls provided by the slot 26, to hold thesaid blade taut, or when such pins are removed to permit a pointedimplement or tool to be passed through the slot 26 to selectively engagethe holes 22 for assisting in the feed of the ribbon blade l6 throughthe way l9 in the knife stock. This blade I6 is made from tempered steelof ribbon or strip form. The blade 55 I6 can be of any desired lengthand the portion not exposed through the knife stock ill will be in acoiled wound condition and confined within the magazine or chamber [5 inthe han- 5 die stock I! of the knife, the unwinding of the blade Itbeing had by the feed Wheel 20 and by an implement when inserted in theslot 26 to engage selectively the holes 22 in the row thereof in saidblade I5.

10 What is claimed is:

In a device for the purpose set forth, a handle having a chambertherein, a blade stock extending longitudinally from the handle and having a grooved edge providing a way for a flexible knife blade and saidhandle having a slot for the passage of the blade into the chamber insaid handle and the portion of the blade received in the chamber of thehandle being coiled upon itself, said blade having a series ofequidistantly spaced holes adjacent to its inner or back edge, a toothedwheel journaled in the handle to engage with certain of the holes in theblade, a turning shaft having an outer kerfed end for turning the wheel,said blade stock adjacent to its outer end having a transverse elongatedslot therethrough in a line with the holes in the blade, as and for thepurpose set forth.

" RUSSELL EDGAR SMITH.

